nio_pop3_enabled = true can improve POP3 performance

[bonadio]

Hello

I have a server with 2000 users 90% pop3 users
Zimbra 5.0.6 OSS fedora 7
Server is Quad core 2.13GHz Xeon 2 GB memory SATA RAID 0 with drbd with other server.

Server load is about 7 and users with imap / web are starting to complain about slow access

I found this option "nio_pop3_enabled = false", it is disabled, if I enable this will the pop3, imap performance get any better?

Or what anyone suggest to improve performance more memory, disk

Thanks

[irfan]

You should follow steps on this page:

Performance Tuning Guidelines for Large Deployments - Zimbra :: Wiki

AFAK nio_pop3_enabled is always kept false. You should see if there are any errors in mailbox.log after doing performance tuning from above wiki.

[bonadio]

Hi Irfan

We already did most of the things discribed there, what do you suggest as the MOST
important parameter that can improve POP3 and make the load goes down?

I have worked with courier imap/pop server and this machine with the same 2000 users
would not be with a 7 load avarage. I know zimbra is not courier but maybe I can tune it
to get a better performance and a smaller load with zimbra.

Anything in special should I look to identify what is killing the server?

Thanks